1. Department of Occupational Health and Safety Engineering, Faculty of Health, Qom University of Medical Sciences , Qom , Iran
2. Student Research Committee, Hamedan University of Medical Sciences , Hamedan , Iran
3. Department of Occupational Health and Safety Engineering, School of Health, Research Center for Health, Safety and Environment, Non-communicable Diseases Research Center, Alborz University of Medical Sciences , Karaj , Iran
4. Swiss Tropical and Public Health Institute , Basel , Switzerland
5. University of Basel , Basel , Switzerland